You can sort clocks automatically or manually rearrange them however you want.
Choose View > Clocks.
Select the "Sort clocks by" checkbox and choose a sort criterion from the pop-up menu. Clocks can be sorted:
alphabetically by city, time zone abbreviation, or alternate text,
by time,
by longitude of the associated city or time zone,
by longitude offset, that is by the difference between the longitude of the associated city or time zone and your local longitude, referred to the interval [-180°,+180 °],
by label.
To reverse the sort order, click the button with the sorting arrow.
To add a second sort criterion, click Add (+) and choose a criterion from the displayed pop-up menu.
To remove a sort criterion, click Delete (-).
Choose View > Clocks.
Deselect the "Sort clocks by" checkbox.
To move a clock to a different position, drag it in the list.
To reposition multiple clocks, select them and drag the selection to a new position.
To select clocks that are next to each other (contiguous) in the list, press the Shift key and then click the first and last clock; to select clocks that are not next to each other in the list, press the Command key and then click each clock.
You can also rearrange clocks directly from the Clocks palette by Command-clicking and dragging them.